J/MNRAS/386/2311 CT1 photometry of Antlia early-type galaxies (Smith+, 2008)
Galaxy populations in the Antlia cluster.
I. Photometric properties of early-type galaxies.
Smith Castelli A.V., Bassino L.P., Richtler T., Cellone S.A., Aruta C.,
Infante L.
<Mon. Not. R. Astron. Soc., 386, 2311-2322 (2008)>
=2008MNRAS.386.2311S 2008MNRAS.386.2311S
ADC_Keywords: Clusters, galaxy ; Photometry, CMT1T2V ; Morphology
Keywords: galaxies: clusters: general - galaxies: clusters: individual: Antlia -
galaxies: dwarf - galaxies: elliptical and lenticular, CD -
galaxies: photometry
Abstract:
We present the first colour-magnitude relation (CMR) of early-type
galaxies in the central region of the Antlia cluster, obtained from
CCD wide-field photometry in the Washington photometric system.
Integrated (C-T1) colours, T1 magnitudes, and effective radii have
been measured for 93 galaxies (i.e. the largest galaxies sample in the
Washington system till now) from the FS90 Antlia Group catalogue.
Membership of 37 objects can be confirmed through new radial
velocities and data collected from the literature.
Description:
The photometric observations were performed with the MOSAIC camera
(eight CCDs mosaic imager) mounted at the prime focus of the 4-m
Blanco telescope at the Cerro Tololo Inter-American Observatory
(CTIO), during 2002 April 4-5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 140 99 FS90 galaxies in our MOSAIC field of the
central Antlia region
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See also:
J/A+AS/141/123 : Galaxies behind Southern Milky Way (Kraan-Korteweg 2000)
J/A+A/391/887 : Redshifts in Hydra/Antlia Extension (Kraan-Korteweg+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [FS90] Sequential number,
[FS90] Antlia NNN in Simbad
5- 9 A5 --- NGC NGC designation
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 20 F4.1 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign(J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 30 I2 arcsec DEs Declination (J2000)
32- 54 A23 --- MType FS90 morphology
56 I1 --- Mm [1/3] FS90 membership status (1)
58- 62 F5.3 mag E(B-V) Reddening
64- 68 F5.2 mag T1mag ? Total Washington T1 magnitude (2)
70- 73 F4.2 mag e_T1mag ? rms uncertainty on T1mag
75- 78 F4.2 mag C-T1 ? Total Washington C-T1 colour index (2)
80- 83 F4.2 mag e_C-T1 ? rms uncertainty on C-T1
85- 88 F4.1 mag/arcsec2 muT1 ? Surface brightness of the limiting
isophote (3)
90- 94 F5.1 arcsec rT1 ? Limiting radius corresponding to muT1 (4)
96- 99 F4.1 mag/arcsec2 mueff ? Mean effective surface brigthness
101-104 F4.1 arcsec reff ? Effective radius, that contains one-half
of the ligh (5)
106-110 I5 km/s HRV ? Heliocentric radial velocity
112-114 I3 km/s e_HRV ? rms uncertainty on HRV
116 I1 --- r_HRV ? Refence code for HRV (6)
118-122 I5 km/s HRV2 ? Second heliocentric radial velocity value
124-126 I3 km/s e_HRV2 ? rms uncertainty on HRV2
128 I1 --- r_HRV2 ? Refence code for HRV 2 (6)
130-140 A11 --- Rem Remarks (7)
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Note (1): FS90 status as follows:
1 = definite members
2 = likely members
3 = possible members
Note (2): not corrected by absorption or reddening.
Note (3): Threshold above which SEXTRACTOR detects and measures the object
MU THRESHOLD), or to the surface brightness of the outermost isophote
for ELLIPSE
Note (4): Radius that contains 90% of the light for SEXTRACTOR. It is the
equivalent radius (r = sqrt(ab) = a*sqrt(1-epsilon)) of the most
external isophote for ELLIPSE FS90 galaxies in our MOSAIC field of
the central Antlia region.
Note (5): This radius is the output parameter HALFLIGHTRADIUS for
SEXTRACTOR, and the equivalent effective radius for ELLIPSE.
Note (6): Radial velocities are as follows:
1 = NED
2 = 6dF, Cat. VII/249
3 = our spectroscopic data
Note (7): Remarks as follows:
SE = magnitudes and colours measured with SEXTRACTOR
ELL = magnitudes and colours obtained from ELLIPSE
DM = doubtful morphology, i.e. FS90 morphology does not match our
images morphology
DC = doubtful coordinates, i.e. FS90 coordinates do not clearly point
to a galaxy
BL = bleeding
GAP = within a gap of the image
NS = nearby bright star
206 = also designated FS90 206.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jun-2009